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(v'NoModeL-S n 3 Sheetssheet 1. H. F. HAWKBS .8v F. E. HERS'EY.

STAVB SAWING MACHINE;

(N0 Modl.) 3 Sheets-Sheet 2.

H. P. HAWKBS & P. E. HBRSEY. STAVB SAWING MACHINE.

N0. 494%829. Patented June 20, 1893.

mi: nowms PETERS co. vnomurno., wumaon, n4 c.

(No Model.) 3 Sheets-Sheet 3.

H. F. H'AWKES & F. E. HERSEY. STAVB SAWING MACHINE.

No. 499,829. PatntedJune 20, 1893.

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UNITED .STATES HARRISON F. HAWKES, OF SWAMPSOOTT, MASSACHUSETTS, ANDFRED HERSEY, OF WOLFBOROUGI-I, NEW HAMPSHIRE.

PATENT OEEICE.

sTAvE-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 499,829, dated June 20,1893.

Application filed November 9, 1891. Serial No. 411,558- (No model.)

To all whom t may concern:

Be it known that we, HARRISON F. HAWKES, residing at Swampscott, in thecounty of EsseX and State of Massachusetts, and FRED E. HERSEY, residingat Iolfborougln in the State of New Hampshire, citizens of the UnitedStates, have invented certain new and useful Improvements inStave-Sawing Machines, of which the following is a specification,reference being had therein to the accompanying drawings.

Our invention has for its object to produce an elicient and quickworking machine for making staves for barrels and the like, and itconsists in mechanism for holding and feeding' the blocks from which thestaves are cut, and also in mechanism for. cutting them, all organizedinto an automatically operating machine as hereinafter described.

We have shown our invention inthe best form now known to us in theaccompanying drawings to which reference is made in the followingdescription.

In the drawings, Figure l is a plan view of the machine, one half insection and with the table partly broken away. Fig. 2 is a verticalsection on line 2-2 Fig. l, on a smaller scale. Fig. 3 is a frontelevation of the mechanism foi-holding and feeding the blocks from whichthe staves are cut. Fig. 4 is a vertical section on line 4--4 Fig. 3.Fig. 5 is a plan View of the same device. Figs. 6 and 7 are details ofthe adjustable crank.

The machine is comparatively simple in construction and consistsprimarily of a cylindrical saw adapted to operate in conjunction withone or more holdingr and feeding devices as will be clear from Fig. l,each of said holding and feeding devices being adapted to present oneblock of wood to the saw so that at each complete vertical movement ofthe saw one or more staves are cut.

The base or table of the machine, which may be of any desired form, isshown at a. This base is preferably in plan of the shape shown in Fig.l, which consists of a circular portion for the feeding devices with asubstantially square portion at one side for the upright frame whichsupports the saw mechanism. 'This upright frame is shown at B and is soshaped as to extend upwardly and forwardly so that its upper end issubstantially vertically above the center of the circular portion of thetable upon which are mounted the feeding devices.

The main shaft of the machine is shown at c Fig. l, and to this shaft asuitable driving pulley is secured. A Worm d is provided -ou the sh aftc which meshes with a gearf on the 'a crank of" shown in detail in Figs.6 and 7.

The crank pin of crank a@ is pivoted in the lower end of the connectingroda. The movement of the eccentric gear is such that the downwardmovement of the connecting 'rod n which governs the downward movementofthe saw p is comparatively slow, While the upward or return movement ofthe connecting rod n and saWp is rapid.

It will be clear that the vertical movement of the saw p Will require tobe greater when long staves are cut than when short ones are made and itbecomes therefore desirable to adj ust the throw of the crank a6. Forthis purpose the crank is formed as shown in Figs. 6 and 7; that is, itconsists of two pieces band c6. The piece 196 is fast to the shaft 7cand is recessed to receive the piece c6. The piece c6 is provided withthe crank pin d and the two pieces are secured by bolts el passingthrough slots e17 so that by loosening the nuts of the bolts the piecesmay be slid on each other and secured at any point. In this Way thelength of the crank may be varied and its throw governed. The upper endof the connecting rod n is pivoted to a' lever Q Which is pivoted at oneend to the link o, which in turn is pivoted to an arm r which projectsupwardly from the upright frame B as shown in Fig.,2. The forward end ofthe lever q is forked and pivotally connected With a vertical rod orplunger s which is free to slide vertically in the bearing t on the endof the upright frame B. The said upright frame B is forked as shown sothat the rod or plunger shall have two bear- IOO ings in said upright Band so that between said bearings a belt may be applied to pulley f6 togive the plunger s and saw p, which is secured to the lower endl of thesaid plunger, a rotary movement in order that the saw may be operated tocut the staves from the blocks.`

The saw 19 is formed of a band of metal in the well-known manner, theupper end of the band being secured to a boss or hub u which is fast onthe lower end of the plunger' S, while the lower end of the cylinder orband of metal is provided with saw teeth. The vertical width of the baud is somewhat greater than the length of a stave, as will be clear. Thesaw is of sufcient diameter to impart to the staves which are cut theproper cross-sectional curve. The cross-sectional curve of staves variesaccording as they are to be used for large or small vessels. If theyare. to be used in the manufacture of a large tub they will be lessconcaved and more nearly dat than if they are to be used in themanufacture of a small tub or pail. Vhen it is desired to Vary theircurve the saw must be taken out and a saw of proper diameter supplied,the feeding and holding devices being adjusted to suit the change madeinthe saw.

Itis to be noted here that the number of feeding devices employed may bevaried and that when a saw of large diameter is used a greater number offeeding devices may be set around it, as will be obvious.

In order to steady the movements of the saw and strengthen the devicethe plunger s is continued downwardly through the center of thecylindrical saw by means of a rod c which is screwed into or otherwisesecured to the v two arms-b one for each upright.

lower end of -t-he plunger s, and passes at its lower end through anaperture in the block or bearing w on the under side of the table orbase A.

In the drawings four feeding devices are shown arranged at equi-distantpoints on the circular portion of the table. As these devices are allalike in construction one only of them will require to be described. Theframe portion of the feeding device consists of two uprights a which areadj ustably secured to the table A and which are more clearly shown inFigs. 3, 4 and 5. Near the base of these uprights and projecting infront of them are These arms are bolted as shown at c to the uprights aby means of bolts which pass through slots d which are formed verticallyin the uprights as shown. These slots permit of the vertical adjustmentof the arms ZJ' when that is desired. Between the arms fb and journaledtherein is the lower feed roll e upon which the lower end of the blockfrom which the staves are cut rests. At one end of the feed roll andfast thereto, is a ratchet f and cofoperating therewith is a pawl g therear end of the pawl g being provided with a spring h as shown whichserves to keep the pawl in contact with the ratchet. v The pawl g ismounted on a linkj' the lower end of which is pivoted on the axle of thefeed roll and the upper end of which is pivoted to a horizontal linklc', which in turn is pivoted to the upper end of a bell-crank lever Z.The bell-crank is pivoted to a block bolted to the upright a by means ofa bolt Z6 which passes through a vertical slot m in said upright, sothat vertical adjustment of the bell-crank and connected parts may beobtained if desired. The end of the horizontal arm of the bell-crank ispivoted by means -of a slot and bolt to a vertical connecting rod n',the lower end of which is provided with a bolt and nut pv by means ofwhich its throw may be varied or adjusted -withl reference to the upwardmovement of the cross-piece q. The adjusting boltp is set in an off-'setportion r of the vertical rod n as will be clear from Fig. 3. By meansof mechanism hereinafter described the crosspiece q is raised at statedintervals and as it.

rises it comes in contact with the lower end of the rod n and operatesto raise the rod. When the rod is raised the bell-crank Z is moved onits pivot, and the connecting rod k is thrown forward thus causing thepawl gto move the ratchet fj and consequently the feed roll, thusfeeding' the block forward. At the upper end of the upright 01, asimilar arrangement of mechanism is provided. The upper feed roll t2 isjournaled in arms or projecting pieces h2 which correspond with thepieces b the arms b2 being mounted on the upper end of rods @zand areconnected by a rigid cross-piece g3 as shown in Fig. 5. The rods c2project downwardly through apertures or bearings in which they slidewhich are formed in the lugs d2 which project from the uprights a.Between the under side of the uppermost lug d2 and a nut e2 which is seton the rod c2 is placed a spiral spring]c2 which tends to press the rodse2 downwardly and thus holds the upper feed roll firmly yet yieldinglyagainst the top of the block which is to be fed forward. The upper feedroll is provided with a ratchet g2 and pawl 72,2, the pawl being mountedin the same manner as is the pawl for the lower feed roll, and beingoperated by means of a link f2, bell crank k2 and the connecting rod n.The bell-crank 7a2 is pivoted to the upper end of the said connectingrod n', which is slotted for purposes of adjustment. The bell-crank7.52, is, like the bell crank l', pivoted to a block which may bevertically adjusted in the slot Z2 when IIO staves of different lengthsare to be cut. The

length. The feed rolls should be toothed to move certainly and securelyfeed and hold` the wood.

In front of the feed rolls are placed cross` pieces a3 see Fig. 3, whichare toothed as shown. As soon as the last stave which a block of woodwill furnish has been cut, and the waste piece passes the feed rolls, itis caught between the toothed cross-pieces as thus preventing the wastepiece from falling against the saw or into its path. This Waste piece isthen removed by hand, and a new block is inserted by hand between thefeedrolls. feed rolls, that is raising the upper feed roll when a newblock is to be inserted, a handlever b3 is provided which is fast at itslower end to a cross rod c3 which is journaled at either end in lugs (Z3sce Fig. 5, which project from a cross-head e3. The cross-head c3 issecured by bolts at either end, which pass through slots in the uprightsa and thus permit of the vertical adjustment of the crossl1eade3. On thecross-shaft c3 are secured dogs f3 which bear on the under side of thecrosspiece which connects the arms b2 and which is shown at g3, Fig. 4.By taking hold of the lever b3 and pulling it down the cross-piece g3and upper feed roll and connected parts are raised so that a new blockmay be inserted. As soon as the block is inserted between the feedrolls, the lever b3 is released and the parts assume their normalposition.

For the purpose of raising the cross-piece q', which is raised atregular intervals to operate the feed mechanism as hereinbeforedescribed, the following device is-provided A cross-shaft h3, see Fig.l, which is suitably mounted underneath the table A, is connected bybeveled gears js k3 with the secondary shaft g. The cross-shaft h3 isalso connected by means of beveled gears Z3 m3 with a shaft n3. Theshaft n3 carries two cams p3 Q3 which lie directly underneath thecross-pieces qof the two feed rolls on one side of the machine as willbe clear from Fig. l. There is one cross piece q for each of the holdingand feeding devices. The shaft n3 is also provided with a gear r3 whichmeshes with a gear s3 on another shaft t3. The shaft t3 is also providedwith two cams us o3 which lie directly under the other ends of the samecross-pieces q. As the shafts n3 153 revolve their cams act in unison toraise the crosspieces q and thus to feedthe two blocks for.- ward on oneside of the machine. The cross piece q is provided with downwardlyprojecting` rigid pins Q5 with which the cams p3 g3, tbc., come directlyin contact when the cross-pieces are raised. On the other side of themachine substantially the same arrangement is provided, there being twoshafts a4 b4 each provided with proper cams and with gears which mesh.The shaft b4 is geared by means of the gears el d4 directly to the shaftg so that the feed movement in each of the four holding and feedingdevices is simultaneous.

The uprights et which serve as frames for the feeding and holdingdevices are each bolted through slots as shown at a5 to the table A, sothat the holding and feeding devices may be adjusted as previouslystated toward or from the center of the table, and thus provision ismade for cutting staves with differ- For the purpose of `separating theVent cross-sectional curves, that is for making staves for tubs, pails orother vessels of different sizes.

It will be noted that the adjustment of the feeding devices toward orfrom the saw does not involve any change or disconnection of themechanism for operating the feed rolls, since the vertical connectingrod n will be operated so long as' the said connecting rod is over anyportion of the cross-piece q', and it will be seen that the saidcross-piece q is of such a length as to insure contact With the vrod nwhether the feeding devices are located near the saw or farthertherefrom.

In the table A directly underneath the saw there is an opening throughwhich the staves as they are cut from the block of wood or bolt mayfall. Any well-known device such as an endless belt or an inclined chutemay be prov ided underneath the said opening in the table for thepurpose of conveying the staves to any given point when they have fallenfrom the machine.

l. The combination with a cylindrical saw, means whereby the same isrotated, and means whereby it is reciprocated in the line of its axis adistance corresponding with the length of a stave comprising a lever qconnected at one end with the shaft of the saw, a rod n, and a rotatingcrank, of devices whereby a block or bolt is held and presented to theaction of the saw, and automatic means whereby the said devices areactuated and the block or bolt is intermittingly fed forward a distanceequal to the thickness of a stave and less than the radius of the saw asthe staves are successively severed therefrom, substantially asdescribed.

2. The combination with a cylindrical saw, and meansfor rotating thesame and for moving it in the line of its axis a distance correspondingwith the length of a stave, of a series of feeding devices arrangedaround the said saw as a center and each comprising devices for holdinga block or bolt in position to be'aeted upon by the saw, and automaticmeans whereby the said devices are actuated for feeding the block orbolt forward intermittingly a distance equal to the thickness of a staveand less than the radius of the saw as the staves are severed therefrom,the said means comprising a single driving shaft and operatingconnections intermediate the same and all the devices aforesaid,substantially as ward intermittingly a distance equal to the thicknessof a stave and less than the radius of the saw, substantially asdescribed.

4t. The combination with a cylindrical saw, and means for rotating thesame, of means for reciprocatingr the said saw in the line of its axiswith a variable motion, comprising eccentric gearing, means foroperating the same, a crank of variable throw operated by the saidgearing, and operative connections intermediate the said crank and theshaft of the saw, devices whereby a block or bolt is held and presentedto the action of .the saw, and automatic means whereby the said devicesare actuated and the block or bolt is fed.

forward intermittingly a vdistance equal to the thickness of a stave andless than the radius of the saw, substantially as described.

5. The combination with the cylindrical saw, of the shaft on which thesaid sawl is mounted, means for reciprocating the said shaft and sawendwise, means for rotating the salne, and bearings for the said shafton opposite sides of the saw whereby the shaft is steadied adjacent toboth ends thereof, substantally as described.

6. The combination with a cylindrical saw, and means for rotating thesame and for reci procating it in the line of the axis thereof adistance corresponding with the length of a stave, of rolls forreceiving between them a block or bolt and presenting the said block orbolt to be sawed into staves, and means whereby the said rolls areintermittingly rotated to feed forward the block or bolt a distanceequal to the thickness of a stave and less than theradius of the saw asthe staves are successively severed therefrom, substantially asdescribed.

7. The combination with the feeding rolls, an endwise movable rod,connections intermediate the said rod and the said rolls whereby thelatter may be rotated, and an adjustable carrying frame, of across-piece with which thesaid rod (zo-operates in allthe positions ofadjustment of lthe adjustable carrying frame, and means forreciprocating the said cross-piece, substantially as described.

8. The combination withthe feed rolls for the block or bolt,areciprocating rod, operating connections intermediate the said rod andthe rolls whereby the latter may be rotated, and means for lifting therod, of an adjustable stop engaging with the framing to determine theextent of the return movement of the rod, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

HARRISON F. HAwKEs.

FRED E. HERsEY.

Witnesses:

CrIAs. F. PARKER, C. H. I-IERsEY.

